What is 2.51428514285142851428514285... as a Fraction?

2.514285 equals 25142699999 as a fraction.

How do you turn 2.514285 repeating into a fraction?

Detailed Answer:

Step 1: To convert 2.514285 repeating into a fraction, begin writing this simple equation:

n = 2.514285 (equation 1)

Step 2: Notice that there are 5 digits in the repeating block (14285) and 1 digit in the non-repeating part (5). Multiply both sides by 10⁶ = 1000000.

1000000 × n = 2514285.14285 (equation 2)

Step 3: Now subtract equation 1 from equation 2 to cancel the repeating block (or repetend) out.

1000000 × n = 2514285.14285
     10 × n = 2.514285
 999990 × n = 2514260

2514260999990 could be the answer, but it still can be put in the simplest form, i.e., reduced.

To simplify this fraction, divide the numerator and denominator by 10 (the GCF - greatest common factor).

n = 2514260999990 = 2514260 ÷ 10999990 ÷ 10 = 25142699999. So,

2.514285 = 25142699999 as the lowest possible fraction.

As the numerator is greater than the denominator, we have an improper fraction, so we can also express it as a mixed number, thus 25142699999 is also equal to 25142899999 when expressed as a mixed number.

The repeating decimal 2.514285 (vinculum notation) has a repeated block length of 5. It is also represented as 2.5142851428514285... (ellipsis notation) which equals approximately 2.51428514285142851428514285 (decimal approximation)(*).

The recurring decimal 2.514285 can be written as a ratio of two integers having 251426 as the numerator and 99999 as the denominator. So, it is a rational number (named after ratio). It can be shown that a number is rational if its decimal representation is repeating or terminating.

(*) At present, there is no single universally accepted notation or phrasing for repeating decimals.